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Carbamazepine, free & total-1959

Test info

Test name:

Carbamazepine, free & total

Test number:

1959

Excellian order number:

LAB1959

Abbreviation:

CZB

Alternate names:

Carbatrol®
CBZ
Epitol®
Epoxide
Tegretol®

Tests included:

Carbamazepine
Carbamazepine, unbound

Useful for:

Therapeutic drug management

Specimen

Specimen type:

Serum

Collection container:

Red serum vial/tube, 5 mL

Volume:

3.0 mL

Minimum volume:

1.2 mL

Collection instructions:

Trough levels are most reproducible

Processing instructions:

Allow sample to clot
Spin
Transfer serum to a Serum/plasma transfer vial/tube (MedTox), labelled as serum, within two (2) hours of sample collection

Transport container:

Serum/plasma transfer vial/tube (MedTox)

Alternate specimen type:

Heparin plasma

Alternate collection container:

Dk green heparin (Li or Na), no gel

Alternate collection instructions:

Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting

Alternate processing instructions:

Spin
Transfer plasma to a Serum/plasma transfer vial/tube (MedTox), labeled as the appropriate plasma type, within two (2) hours of sample collection

Transport and stability:

Refrigerated (preferred)

Ambient - 3 days

Frozen (OK)

Reason for rejection:

Gel barrier tubes

Performance

Performing lab:

MedTox Laboratories (954): R-MX

Days set up:

Daily

TAT:

1 - 2 days

Method:

Ultrafiltration; Immunoassay (IA)

Clinical and Interpretive info

Reference ranges:

Carbamazepine, total: 4.0 - 12.0 µg/mL

Carbamazepine, free: 0.6 - 4.2 µg/mL

Billing

CPT codes:

80156
80157

Tracking

Date created:

11/30/2001

Revised date:

07/12/2023

Review date:

07/12/2023